Injecting into a Jersey Resource class

Question

I did try going through the following links How to wire in a collaborator into a Jersey resource? and Access external objects in Jersey Resource class But still i am unable

Answer 1

This solution works well and I wanted to share what I found to enable CDI on jersey resources.

Here is the simplest bean ever :

package fr.test;

import javax.annotation.PostConstruct;
import javax.enterprise.context.RequestScoped;

@RequestScoped
public class Test {

    private int i;

    @PostConstruct
    public void create() {
        i = 6;
    }

    public int getI() {
        return i;
    }
}

In your resource class, we just inject this bean, as we would do in a any normal context :

package fr.test;

import javax.inject.Inject;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;

@Path("/login")
public class LoginApi {

    @Inject
    private Test test;

    @GET 
    @Produces("text/plain")
    public String getIt() {
        return "Hi there!" + test;
    }
}

And here is the key. We define a Jersey "InjectionProvider" which will be responsible of beans' resolution :

package fr.test;

import javax.inject.Inject;

import java.lang.reflect.Type;
import javax.ws.rs.ext.Provider;

import com.sun.jersey.core.spi.component.ComponentContext;
import com.sun.jersey.core.spi.component.ComponentScope;
import com.sun.jersey.spi.inject.Injectable;
import com.sun.jersey.spi.inject.InjectableProvider;

import fr.xxxxxxxxxx.ApplicationBeans;

@Provider
public class InjectionProvider implements InjectableProvider {

    public ComponentScope getScope() {
        // CDI will handle scopes for us
        return ComponentScope.Singleton;
    }

    @Override
    public Injectable getInjectable(ComponentContext context,
            Inject injectAnno, Type t) {
        if (!(t instanceof Class))
            throw new RuntimeException("not injecting a class type ?");

        Class clazz = (Class) t;

        final Object instance = ApplicationBeans.get(clazz);

        return new Injectable